Well yes, optical + electrical (is there any other kind of mini optical jack?). It turns out the datasheet for the Chinese samples we got was incorrect and resulted in us frying our samples! A Chinese company calling themselves Edison-Opto claims to do business with Apple. Maybe that is where the optical minijacks on the current iMacs come from? Weird thing is that there are a number of Chinese vendors that all sell the same products and all claim to be the manufacturer.

Thanks,
Stu